Morphology and evolution of the ejecta of Hale crater in Argyre basin, Mars: Results from high resolution mapping

M. R. El-Maarry, J. M. Dohm, G. Michael, N. Thomas, S. Maruyama

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)


    We use various data sets, including images from the High Resolution Imaging Science Experiment camera (HiRISE), to examine the ejecta of the generally fresh-looking Hale crater that occurs in the rugged mountain terrain of Nereidum Montes in the northern rim materials of the Argyre impact structure on Mars. Our investigation reveals that the distal parts of the Hale crater ejecta and other basin deposits behave like viscous flows, which we attribute to the secondary flow of ejecta mixed with water-ice-rich basin materials. Consistent with water-enrichment of the basin materials, our mapping further reveals occasionally deformed surfaces, including highly conspicuous features such as mounds and fractured plateaus that we interpret to be a result of periglacial modification, subsequent (including possibly present-day) to the transient localized melting and fluvial erosion caused by Hale-impact-generated heating. In particular, our morphometric analysis of a well-defined valley system west of Hale crater suggests that it may have been formed through hydrologic/glacial activity prior to the Hale impact, with additional modification resulting from the impact and subsequent geologic and hydrologic phenomena including glacial and periglacial activity.

    Original languageEnglish
    Pages (from-to)905-922
    Number of pages18
    Issue number1
    Publication statusPublished - Sep 2013


    • Geological processes
    • Impact processes
    • Mars, Surface

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science


    Dive into the research topics of 'Morphology and evolution of the ejecta of Hale crater in Argyre basin, Mars: Results from high resolution mapping'. Together they form a unique fingerprint.

    Cite this